FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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What method of repair is recommended for a steel tube longeron dented at a cluster?

  1. Application of a chemical metal filler.

  2. Non-welded mechanical fastening patch.

  3. Welded patch plate.

  4. Use of adhesive-bound external splints.

The correct answer is: Welded patch plate.

A welded patch plate is recommended for repairing a steel tube longeron that is dented at a cluster for a few reasons. First, a chemical metal filler may not be strong enough to fully repair the damage caused by the dent, especially if it is a severe dent. Additionally, a non-welded mechanical fastening patch may not be secure enough to hold up over time, as it relies on screws or rivets rather than a continuous weld. Finally, the use of adhesive-bound external splints may not provide enough structural support to fully repair the dent. Therefore, the best option is to use a welded patch plate for a strong, permanent repair.